Amarkant814
diff --git a/‎March Leetcode Challenge 2021/3 setMismatch.cpp
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+26Lines changed: 26 additions & 0 deletions b/‎March Leetcode Challenge 2021/3 setMismatch.cpp
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+26Lines changed: 26 additions & 0 deletions
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+class Solution {
+public:
+    vector<int> findErrorNums(vector<int>& nums) {
+        
+        unordered_set <int> uset;
+        vector<int> ans;
+        for (int x: nums){
+            if (uset.find(x) != uset.end()) {
+                ans.push_back(x);
+            }
+            else {
+                uset.insert(x);
+            }
+        }
+        
+        int i;
+        for(i = 1; i <= nums.size(); ++i){
+            if (uset.find(i) == uset.end()){
+                ans.push_back(i);
+            }
+        }
+        
+        
+        return ans; 
+    }
+};